The article is jointly concluded by each investor and comes into effectfrom the day when the company is established.
能否为了强调从…之后，在from+时间后面加onwards, 改为:The article isjointly concluded by each investor and comes into effect from the day when thecompany is established onwards.
请问这个from the day onwards假如the day 后有定语从句的话，onwards写在句尾对吗？或者应该写在哪儿？
我的理解是如此的。你不可以把onwards 放在从句后面把这个习惯搭配分隔开。假如你非要这么表达，可以如此用：will come into effect from the day onwards, the day when the company is established. 当然如此比较繁琐，一般是没必要的。
come into effect 能否接动态动词，我的理解和曹老师有的不同。from that day onwards 是从这天开始并延续的意思，但强调的重点在from that day, 因此是可以和有的动态动词连用的。这里应该注意一个细节：你的句子由于day 后是定语从句，所以可以用the. 假如没从句或定语修饰，单独用的话，要用that/this。 我没见过from the day onwards 的说法。
关于come into effect +from+time +onwards 的使用方法，请看外媒例句：
The content and presentation of Pulse and Digital Circuits is designed based on the recently revised JNTU syllabus that came into effect from June 2006 onwards.
from +time+onwards 和有的动态动词连用的例子，请看外媒例句：
From that day onwards he started feeding it.
From that day onwards, the cat began to catch the mice every day.
个人剖析，仅供参考！